FLOW ~TECH
AI R
SCD
RCD
PCD
CED
DIS T RIBUTION
SPECIALIST
Supply Ceiling Diffuser
Return Ceiling Diffuser
Perforated Ceiling Diffuser
Combined Ceiling Diffuser
w ith Egg Crate Core
FAISAL JASSIM INDUSTRIES (L.L.C.)
P 0. Box: I 871 Dubai, U.A.E.
Tel: +971 4 Z582 64 0
Fax: + 971 4 25.826~ 1
E-mail: flowtech@fjtco.com
Website: www.faisaljassim.ae
www.flowtechind.com
CEILING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
APPLICATIONS
FLOWTECH provides a wide range of Ceiling Diffusers
to suite the various requirements of ceiling air
distribution.
Supply air ceiling diffusers (SCD) and return air ceiling
diffusers (RCD) can be Square or Rectangular Ceiling
Diffusers with One, Two, Three or Four Way Patterns.
The different diffuser patterns are used to control
supply air direction. Typical examples of such
application are supply diffusers near glass areas, supply
diffusers in corridors, and supply diffusers in space
corners.
FLOWTECH SCD is supplied with Opposed Blades
Damper (OBD) to facilitate for precise air volume
control. (Note: OBD is used for fine tuning of air
volume flow rate, and should not be used to replace
branch Volume Control Damper). RCD is supplied
without OBD and usually used for return air
applications. In certain applications, SCD must be used
as return air diffuser; that is, where return air volume
requires precise control, such as room pressurization
applications. This is frequently required for Clean Room
Engineering
applications
such
as
Hospitals,
Pharmaceutical Plants, Biotech Laboratories, Computer
Rooms and Silicon Industry.
Supply Air 4 Way ceiling diffuser (SCD-4S)
Supply Air 3 Way ceiling diffuser (SCD-3S)
SCD and RCD are commonly used for Heating,
Cooling and Isothermal Ventilation applications.
However, such applications are limited to 4 meters
ceiling high. For Ceiling Heights above 4.0 Meters, refer
to specialty terminal devices, such as Jet Nozzle
Diffusers and Drop Ceiling Diffusers.
SCD and RCD are tested by ETL Semko USA to
ASHRAE 70 - 1991 standard method of testing for
rating performance of air outlets and inlets.
Return Air Rectangular 4 way ceiling diffuser (RCD- 4R)
Perforated ceiling diffuser (PCD) is of same
construction as SCD but with a removable perforated
face of G1 sheet powder coated, or aluminium sheet as
optional.
4 Way supply ceiling diffuser with perforated face (PCD)
Rev. 0:2005/1
F-1
FLOW ~ECH
AIR
DISTR I BUTION
SPECIALIST
Opposed Blades Damper (OBD):
MATERIAL:
Frame and Core are made of extruded
aluminum alloy 6063 to T6 Heat Treatment.
The Opposed Blades Damper is extruded
aluminum alloy 6063/T6.
Mitred Comer
Spring loaded core
FLOWTECH OBD is fixed to the rear frame of SCD
model by means of "S" clamp for ease of removal and
rigid construction.
To adjust the OBD opening, remove the core and tum
the adjustment screw available at the front face of the
damper (Clockwise to open I Counter Clockwise to
Close).
(A)-12 mm
- g~~F-~~
(A)+66mm
(A)+ I45mm
I
_ __
-
Multi pattern ceiling diffuser section without damper (RCD)
(A)-12 mm
J\J\1\J\J\
E
E
;:::=.~=;;~::=~~~~~ - ~
...j
~------~--~--~~--~~--~~--~----~--~--
-!--~----+l3ml
-
Multi pattern ceiling d1ffuser section with damper (SCD)
Square ceiling diffusers
Neck Size
F-2
Rectangular ceiling diffusers
Face Size
ISO x ISO
295
22S
370 X 370
X
22S
X
295
300 X 300
445
37S
520 X 520
X
37S
X
445
4S0 X 450
595
X
595
S2S
S2S
670
X
670
600 X 600
745
X
745
X
Ax B Size (mm)
225 X ISO
300 X ISO
37S X ISO
4SO x ISO
S2S X ISO
300 X 22S
375 X 225
4S0 X 22S
S25 X 225
375 X
450 X
525 X
600 X
670 X
450 X
525 X
600 X
670 X
300
300
300
300
300
375
375
375
375
Rev. 0:2005/ I
FLOW~ ~ECH
AIR
•
D IST R IBUTION
SPECIALIST
Available in Powder coated RAL 9010 or
.as standerd color 9016
__.- By self tapping screw through the ned<
o f d1ffuser into sheet metal duct
(
Other powder coated color fi nishes are available
on request.
Fixing options are Concealed Screw Fixing (CSF).
\
- ~~Standard fixing (CSF)
Opposed blade damper for supply (optional) - OBD
The specially designed blades have an overlapping lip
w hich assure a t ight closure.
Control is done by adjustment screw t hrough t he face
of diffuser.
Material: Extruded aluminum construction.
Opposed blade damper for s upply (OBD)
/ -~
i 1 i 1 ~~~--
Equalizing grid (optional)- EG
Individually adjustable blades, to provide precise
directional control of air through the diffuser.
Nylon tension bushes.
Extruded aluminum construction.
I
-
Circular duct connection
adaptors (optional)
00
Suit able for supply and exhaust ceilling
diffusers.
Round inlet.
Galvanized steel construction.
Special construction available on
request.
Nom.
sizes
ISO
225
300
375
450
525
600
00
0W
123
198
248
313
398
398
498
123
198
248
313
398
398
498
Type RS
HI
245
320
368
435
520
520
620
H2
263
338
388
453
538
538
638
2H
...___,_
.____w~--.1
RSI
Type RT
RT
H3
245
320
368
435
520
520
620
Square to round adapto r Top inlet
H4
263
338
388
453
538
538
638
Squane to round adaptor
witho ut perforat ed plate. Side inlet
... so 1-
~======~
•···········•·······•••··········...•..
··•·······•······················...
~r
Fixing
4 holes 8 mm diameter
for straps or droop rods.
Equalizing grid - optional (EG)
RS
RSI
Square to round adapto r with perforated
plate side inlet
Insulated squane to round adapt o r
wit h perforated plate. Side inlet
Circular Duct Connection Adaptors
Rev. 0:2005/ I
F-3
CEILING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
MULTI PATTERN CEILING DIFFUSERS
4 WAY DISCHARGE
Square (SCD-4S)
3 WAY DISCHARGE
Rectangular (SCD-4R)
Square (SCD-3S)
Rectangular (SCD-3R)
Rectangular
Vertical (SCD-2RV)
Rectangular
Horizontal (SCD-2RH)
2 WAY DISCHARGE
Square (SCD-2S)
Corner (SCD-2SC)
1 WAY DISCHARGE
Square (SCD-1S)
F-4
Rectangular
Vertical (SCD-1RV)
Rectangular
Horizontal (SCD-1RH)
Rev. 0:2005/1
FLOW '-TECH
AIR
DISTRIBUTION
SPECIALIST
Perforated Cei ling Diffuser (PCD)
_
Product Features:
• This product is designed to provide laminar flow with
•
The perforated ceiling diffuser is especially effective in
low velocities, evenly distributed downward moving
areas with heavy, localized intemal loads, as in
conditioned air.
computer rooms. The column of air delivered by the
perforated ceiling diffuser cools t he load source
directly without generating high velocities in the
occupied space.
Accessories:
Opposed blade damper for supply (optional)- OBD
The specially designed blades have an overlapping lip
w hich assure a tight closure.
Control is done by adjustment screw through the face of
diffuser.
Material: Extruded aluminum construction.
Rev. 0:2005/ I
Equalizing grid (optional) - EG
Individually adjustable blades, to provide precise
directional control of air t hrough t he diffuser.
Nylon tension bushes.
Extruded aluminum construction.
F-5
AIR
DISTRI B UTION
SPECIALIST
- ·-
Gasket (optional)
Combined Ceiling Diffusers (CED)
I
(A)- 12 mm
I 3B mm
. 73921
I
~~-------;;:;;
~
~~~
I II
I
I
133mm
(A)+ 145mm
I
Side Section of Combined Ceiling Diffusers (CED)
Product Feature s:
Standard Sizes:
•
(Use any combi nation of length & widt h)
•
•
This model is designed to handle bot h supply and
return air requirements in a si ngle unit.
Length A (mm)
Width B (mm)
Conditioned air is supplied at t he outer perimeter,
and the retum is through t he center core.
300
300
375
375
The center core which is t he ret urn part is made of
alumi nium egg crate grid (CEO), the size can be
determined according t o the supply and return air
flow requirements.
450
450
525
525
600
600
The minimum size of the center core is 75mm, the
maximum size is equal to t he nominal size of the
combined ceiling diffuser minus 75mm, however
the size ofthe core must be in steps of 75mm.
•
To convert into Imperial units use (I inch=25mm)
Non standard sizes are available upon request
Core size to be mentioned separately
Available types of finishing:
Powder coated (painted to RAL codes)
F-6
Rev. 0:2005/ I
AIR
DISTRIBUTION
I
SPECIALIST
DOD-DOI
A
X
B-
DODD
I
~
I
RAL Code
Color
Width in mm o
inch
Length in mm
or inch
SCD
SCD
SCD
SCD
SCD
SCD
SCD
SCD
SCD
SCD
PCD
CED
or
or
or
or
or
or
or
or
or
or
RCD RCD RCD RCDRCD RCDRCD RCD RCD RCD -
4S : 4 Way Square D iffuser
4R : 4 Way Rectangular Diffuser
3S : 3 Way Square D iffuser
3R : 3 Way Rectangular Diffuser
2S : 2 Way Square D iffuser
2RV: 2 Way Rectangular Vertical
2RH : 2 Way Rectangular Horizontal
I S : I Way Square D iffuser
I RV: I Way Rectangular Vertical
I RH : I Way Rectangular Horizontal
: Perforated Ceiling Diffuser
: Combined Ceiling D iffuser
with Egg Crate Core Pattem.
SCD-4S-300mm X 300mm-9010
Stands for Supply Ceiling Diffuser, 4W ay, 300x300
coating color RAL 90 I 0.
Rev. 0:2005/1
E-7
CEILING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
GENERAL NOTES
Pages onwards give performance data for all models
and variants, and unless otherwise stated the following
general notes apply:
1
For standard room height of 2.75 metres, throws
should be taken as the distance to the nearest wall
(minimum plan dimension, MPD), or to half the
distance between diffuser centres.
4
When mounted without a surrounding closed
ceiling the throw will be reduced by approx. 40%,
ie throw = table throw x 0.6
However in order to avoid the airflow 'dumping'
into the space when on cooling mode, giving
excessive velocities, it may be necessary for coanda
plates to be fitted to the diffuser. Please check with
factory for details.
6
F-8
NC, and Pressure values shown, are based on a
diffuser complete unit with an opposed blade
damper in the fully open position for the supply
diffuser and without for the return diffuser. The
damper should only be used for fine balancing, as
for every doubling of pressure there is a resulting
increase in the noise level of +9dB for supply, or
+5dB for exhaust.
8
Models with reduced necks.
There is a 'dilution effect' on performance for these
models, as the air tends to spread behind the core,
reducing throws by up to 20%, depending on the
relationship between the neck size and the base
diffuser size. For more information please check
with the factory.
9
For rectangular diffusers, throw values tested are on
the longer side of the diffusers. For the shorter side
throws, values are to be multiplied by 0.72.
Throws shown are to three terminal velocity of
0.25m/s, 0.5m/s, 0.75m/s, (50fpm, 100fpm,
150fpm) with coanda effect across a flat ceiling,
and with supply air at conditions with max
DT=10K cooling.
2
5
7
Another fault that can give rise to 'dumping' on
cooling cycles is low jet velocities at the diffuser
core. In order to avoid this it is advisable to ensure
that neck velocities do not drop below 0.75m/s,
(150fpm).
The accoustical data were tested in accordance to
ASHRAE 70-1991 standard. The octave band
sound power levels obtained were plotted to
determine the point of tangency with the highest
rank Noise Criteria curve (NC) to establish the
NC. Noise Criteria ratings were determined by
subtracting room absorption of 10dB from the
sound power level data.
10 Corrections for 1, 2 and 3 way diffusers
3 way pattern throw :
Multiply by 1.15
2 way pattern throw :
Multiply by 1.25
1 way pattern throw :
Multiply by 1.45
11 The following tables include the results of tests
conducted on samples of air terminals. The test
results include Noise Criteria (NC), static pressure
verses air flow, throw and effective area.
Extrapolation was used to obtain the performance
for other sizes and other parameters within the
range of products mentioned above.
Test method included in ETL report.
Rev. 0:2005/1
CEILING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
PERFORMANCE DATA - SI UNITS
SYMBOLS
L/Sec :Air volume in litres per second.
Af
:Effective free area in square meters.
Vf
:Face velocity in meters per second.
Ak
:Neck area in square meters.
Vk
:Neck velocity in meters per second.
Pt
:Total pressure in pascal
Th.
:Throw in meters.
NC
:Noise Criteria.
NOTES
• The large throw values are based on the minimum
terminal velocity of 0.25 m/Sec.
• The middle throw values are based on the medium
terminal velocity of 0.50 m/Sec.
• The small throw values are based on the maximum
terminal velocity of 0.75 m/Sec.
CONDITIONS
• Supply or Return as indicated.
• Noise Criteria values are based on (10 dB) room
attenuation.
• Damper is fully open.
• Maximum room height = 4.0m
• Cooling @ T = 10k
CORRECTION FOR 1, 2 AND 3 WAY
• Noise criteria : No correction required.
• Pressure
: No correction required.
• Throw
: 3 way - increase for 15%
: 2 way - increase for 25%
: 1 way - increase for 45%
• Drop
: No correction required.
ETL TEST REPORTS
Rev. 0:2005/1
F-9
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY NECK
AREA
(m2)
FREE
AREA
(m2)
150x150
0.019
0.009
225x225
0.046
0.021
300x300
0.083
0.036
375x375
0.132
0.055
450x450
0.192
0.077
525x525
0.263
0.102
600x600
0.346
0.128
SIZE
(mmxmm)
See notes on page F-9
Rev. 0:2005/1
NECK
VELOCITY (m/s)
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
0.9
1.2
1.8
2.4
2.7
3.3
3.6
(SCD - 4S)
SI - UNITS
1.00
1.50
2.00
2.25
2.50
2.75
19
2.13
3
1.2 2.4
<15
46
2.21
2
2.1 3.8
<15
83
2.29
2
2.7 5.4
<15
132
2.38
2
3.6 6.9
<15
192
2.48
2
4.2 8.1
<15
263
2.59
2
4.6 9.3
<15
346
2.70
2
5.7 11.0
<15
29
3.19
7
1.8 3.4
<15
69
3.31
3
3.3 5.4
<15
124
3.44
4
3.9 7.2
<15
198
3.57
4
5.1 9.0
<15
288
3.72
4
6.0 11.0
<15
395
3.88
4
7.2 12.0
16
519
4.05
4
8.1 14.0
19
38
4.26
13
2.7
<15
92
4.41
9
3.7
<15
166
4.58
8
5.4
<15
264
4.76
8
6.9
18
384
4.96
8
8.1
22
526
5.17
9
9.6
25
691
5.41
9
11.0
29
43
4.79
17
3.0
<15
104
4.96
11
3.9
18
187
5.15
11
5.9
17
296
5.36
11
7.5
23
432
5.58
11
8.9
28
592
5.82
12
10.4
31
778
6.08
12
12.0
35
48
5.32
21
3.3
<15
115
5.51
14
4.0
21
207
5.73
14
6.3
19
329
5.95
14
8.1
28
480
6.20
14
9.6
34
658
6.47
16
11.0
37
864
6.76
16
13.0
40
52
5.85
29
3.5
17
127
6.07
18
4.7
23
228
6.30
18
6.8
22
362
6.55
18
8.6
32
528
6.82
18
10.1
37
724
7.11
20
11.7
40
951
7.43
20
13.5
43
1.2
2.1
2.7
3.6
4.2
4.8
5.4
1.8
2.3
3.6
4.8
5.7
6.6
7.5
4.2
2.0
5.7
2.7
8.1
4.1
10.0 5.3
12.0 6.2
14.0 7.2
16.0 8.3
4.5
2.1
5.9
3.0
8.6
4.5
10.8
5.7
12.8
6.6
15.0
7.8
17.1
9.0
4.8
2.4
6.1
3.6
9.0
5.0
11.0
6.3
14.0
7.4
16.0
8.7
18.0 10.1
3.00
4.9
7.0
9.5
12.2
14.4
16.8
19.1
57
6.38
38
2.7 3.6
19
138
6.62
20
4.2 5.4
25
249
6.87
22
5.4 7.2
25
395
7.14
22
6.9 9.0
35
576
7.44
22
8.1 11.0
39
790
7.76
25
9.6 12.0
42
1037
8.11
25
11.0 14.0
45
3.50
4.9
3.0
7.8
4.8
9.9
6.3
13.0 7.8
15.0 9.3
18.0 11.0
20.0 12.0
67
7.45
41
3.9
22
161
7.72
31
6.0
28
290
8.02
32
7.8
32
461
8.33
32
9.6
41
671
8.68
32
11.0
44
921
9.05
36
13.0
47
1210
9.46
36
15.0
50
4.00
5.4
8.4
11.0
14.0
16.0
19.0
22.0
76
8.51
52
3.3 4.2
24
184
8.82
42
5.1 6.3
33
332
9.16
43
6.9 8.1
36
527
9.52
43
8.4 10.0
45
767
9.92
43
12.0 16.0
48
1053
10.34
49
12.0 14.0
51
1383
10.81
49
14.0 16.0
53
5.4
9.3
11.0
15.0
18.0
21.0
24.0
Contd...
F-10
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY NECK
AREA
(m2)
FREE
AREA
(m2)
225x150
0.029
0.014
300x150
0.040
0.018
375x150
0.050
0.022
450x150
0.060
0.026
525x150
0.071
0.030
600x150
0.081
0.034
300x225
0.061
0.027
SIZE
(mmxmm)
See notes on page F-9
Rev. 0:2005/1
(SCD - 4R)
SI - UNITS
NECK
VELOCITY (m/s)
1.00
1.50
2.00
2.25
2.50
2.75
3.00
3.50
4.00
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
29
2.17
2
1.8
<15
40
2.20
2
2.1
<15
50
2.24
3
2.4
<15
60
2.28
3
2.7
<15
71
2.32
3
2.7
<15
81
2.36
3
2.8
<15
61
2.25
3
2.7
<15
44
3.25
3
2.4
<15
60
3.31
3
3.0
<15
75
3.37
4
3.3
<15
91
3.43
4
3.6
<15
106
3.49
4
3.9
<15
122
3.55
4
4.2
<15
92
3.37
4
3.6
<15
59
4.33
7
3.3
<15
79
4.41
8
3.6
<15
100
4.49
9
4.5
<15
121
4.57
9
4.8
<15
142
4.65
9
4.8
<15
162
4.73
9
5.7
<15
123
4.49
9
4.8
<15
66
4.87
12
3.6
<15
89
4.96
11
3.9
15
113
5.05
13
4.8
15
136
5.14
13
5.1
15
159
5.23
13
5.1
15
183
5.32
13
6.2
16
138
5.06
13
5.1
15
73
5.41
17
3.9
<15
99
5.51
14
4.2
16
125
5.61
17
5.1
16
151
5.71
17
5.4
16
177
5.81
17
5.4
16
203
5.91
17
6.6
17
153
5.62
17
5.4
16
81
5.96
23
4.2
17
109
6.06
22
4.5
19
138
6.17
21
5.4
19
166
6.28
21
5.7
20
195
6.39
21
5.7
20
223
6.50
21
7.1
21
169
6.18
21
5.7
20
88
6.50
29
4.5
20
119
6.61
30
4.8
21
150
6.73
26
5.7
22
181
6.85
26
6.0
23
212
6.97
26
6.0
23
243
7.09
26
7.5
24
184
6.74
26
6.0
23
103
7.58
38
5.1
26
139
7.72
38
5.4
27
175
7.85
36
6.3
28
212
7.99
36
6.9
29
248
8.13
36
6.9
29
284
8.27
36
8.1
30
215
7.86
33
6.9
29
118
8.66
51
5.4
30
159
8.82
51
6.0
31
200
8.97
50
7.2
32
242
9.13
50
7.8
33
283
9.29
50
7.8
33
325
9.46
50
8.4
34
245
8.99
42
7.8
33
1.2
1.5
1.5
1.8
1.8
1.7
1.8
3.3
1.8
4.2
2.1
4.2
2.1
4.5
2.4
4.8
3.0
5.5
3.0
4.5
2.4
4.2
2.4
4.8
2.7
5.7
3.3
6.0
3.6
6.9
3.6
7.5
3.9
6.0
3.6
5.1
2.7
5.7
3.0
6.9
3.6
7.5
3.9
8.1
3.9
8.4
4.4
7.5
3.9
5.6
3.0
6.2
3.3
7.2
3.9
7.8
4.2
8.4
4.2
8.9
4.8
7.8
4.2
6.0
3.3
6.6
3.6
7.5
4.2
8.1
4.5
8.7
4.7
9.3
5.3
8.1
4.5
6.3
3.6
6.9
3.9
7.8
4.5
8.6
4.8
9.0
5.1
9.8
5.7
8.6
4.8
6.6
4.2
7.2
4.5
8.1
5.1
9.0
5.4
9.3
5.7
10.0 6.6
9.0
5.4
7.2
4.5
7.8
5.1
8.7
6.0
9.9
6.3
10.0
6.3
11.0
7.2
9.9
6.3
7.5
8.4
9.9
11.0
11.0
12.0
11.0
Contd...
F-11
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(mmxmm)
NECK
AREA
(m2)
FREE
AREA
(m2)
0.077
0.034
375x225
0.093
0.040
525x225
0.109
0.046
600x225
0.125
0.052
375x300
0.105
0.045
450x300
0.126
0.053
525x300
0.148
0.061
See notes on page F-9
Rev. 0:2005/1
SI - UNITS
NECK
VELOCITY (m/s)
1.00
1.50
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
77
2.29
3
2.7
116
3.43
4
2.7
3.9
1.8
NC
450x225
(SCD - 4R)
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
Throw (m)
NC
4.5
<15
2.4
2.4
2.4
2.4
2.4
2.4
93
2.33
3
3.3
<15
109
2.37
3
3.0
<15
125
2.42
3
3.0
<15
105
2.33
3
3.3
<15
126
2.38
3
3.0
<15
148
2.42
3
3.6
<15
6.9
2.00
2.25
155
4.58
9
3.6 5.1 7.8
174
5.15
13
5.4 5.4 8.3
17
21
<15
6.0
3.0
6.0
3.0
6.0
3.3
6.6
3.0
6.0
3.3
7.5
3.6
140
3.50
4
4.2
<15
164
3.56
4
4.8
<15
188
3.63
4
5.1
<15
157
3.50
4
4.5
<15
189
3.57
4
4.8
<15
222
3.64
4
5.4
<15
7.5
4.2
7.5
4.2
7.5
4.5
7.5
4.5
7.2
4.2
9.3
5.1
187
4.66
9
6.0
<15
219
4.75
9
6.0
<15
250
4.83
9
6.0
<15
209
4.67
9
6.3
<15
252
4.76
9
5.7
<15
295
4.85
9
7.5
<15
9.0
4.7
8.7
4.7
8.7
5.0
9.0
5.0
8.4
4.7
11.0 5.7
210
5.24
13
6.5
16
246
5.34
13
6.3
16
282
5.44
13
6.5
17
235
5.25
13
6.6
17
284
5.35
13
6.2
17
332
5.46
13
8.0
17
2.50
193
5.72
17
7.2 5.7
8.7
2.75
3.00
3.50
213
6.29
21
6.2 6.0 9.2
232
6.87
26
5.1 6.3 9.6
271
8.01
33
5.7 6.9 11.0
24
9.3
5.1
9.0
5.1
9.0
5.4
9.5
5.4
8.7
5.1
11.4
6.3
233
5.83
17
6.9 9.6
18
273
5.93
17
6.6 9.3
18
313
6.04
17
6.9 9.3
19
261
5.84
17
6.9 9.9
19
315
5.95
17
6.6 9.0
20
369
6.06
17
8.4 12.0
20
27
5.6
5.6
5.9
5.9
5.6
6.9
257
6.41
21
7.2
22
300
6.53
21
7.1
22
344
6.65
21
7.2
23
287
6.42
21
7.4
23
347
6.54
21
6.9
24
406
6.67
21
8.9
24
30
10.1
6.0
9.6
6.0
9.8
6.3
10.2
6.3
9.5
6.0
12.8
7.5
280
6.99
26
7.5
25
328
7.12
26
7.5
25
376
7.25
26
7.5
26
314
7.00
26
7.8
26
378
7.14
26
7.2
27
443
7.27
26
9.3
27
4.00
309
9.15
42
6.6 7.8 11.0
34
11.0 6.6
9.9
6.9
10.0 6.9
11.0 6.9
9.9
6.9
13.0 8.1
327
8.16
36
8.1
31
382
8.31
36
8.4
31
438
8.46
36
8.7
32
366
8.17
36
8.4
32
442
8.33
36
8.4
33
517
8.49
36
9.9
33
38
11.0
7.2
11.0
7.2
11.0
7.5
11.0
7.5
11.0
7.2
14.0
9.0
373
9.32
50
8.7
35
437
9.49
50
9.0
35
501
9.67
50
9.0
36
418
9.34
50
9.3
36
505
9.52
50
8.7
37
591
9.70
50
11.0
37
12.0
13.0
13.0
13.0
12.0
16.0
Contd...
F-12
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(mmxmm)
NECK
AREA
(m2)
600x300
0.169
450x375
0.159
525x375
0.186
600x375
0.213
525x450
0.225
600x450
0.258
600x525
0.302
FREE
NECK
AREA
VELOCITY (m/s)
(m2)
Q (L/s)
Vf (m/s)
Pt (Pa)
0.069
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.066
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.075
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.084
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.089
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.100
Throw (m)
NC
Q (L/s)
Vf (m/s)
Pt (Pa)
0.114
Throw (m)
NC
2.4
2.4
2.7
2.7
2.4
3.3
3.3
(SCD - 4R)
SI - UNITS
1.00
1.50
2.00
2.25
2.50
2.75
3.00
3.50
169
2.47
3
3.3
<15
159
2.43
3
3.3
<15
186
2.48
3
3.9
<15
213
2.53
3
4.5
<15
225
2.53
3
4.2
<15
258
2.58
3
4.8
<15
302
2.64
2
5.1
<15
254
3.71
4
6.0
<15
238
3.65
4
6.0
<15
279
3.72
4
6.3
<15
320
3.79
4
6.3
<15
337
3.80
4
6.0
<15
386
3.88
4
7.2
<15
452
3.96
4
7.8
<15
339
4.94
9
7.8
<15
317
4.85
9
7.8
<15
372
4.95
9
8.1
<15
427
5.05
9
8.7
<15
449
5.06
9
8.4
<15
515
5.17
9
9.6
<15
603
5.29
9
10.0
15
381
5.56
13
8.3
18
358
5.46
13
8.3
18
419
5.57
13
8.6
18
480
5.68
13
9.3
18
506
5.69
13
8.9
18
579
5.81
13
10.4
19
679
5.95
12
11.0
20
423
6.18
17
8.7
21
398
6.06
17
8.7
21
466
6.19
17
9.0
21
534
6.32
17
9.9
22
562
6.33
17
9.3
22
644
6.46
17
11.0
23
754
6.61
16
12.0
24
466
6.80
21
9.2
25
437
6.67
21
9.2
21
512
6.81
21
9.5
25
587
6.95
21
10.5
26
618
6.96
21
9.8
26
708
7.11
21
11.9
27
830
7.27
20
12.2
28
508
7.41
26
9.6
28
559
7.28
26
9.6
28
559
7.43
26
9.9
28
640
7.58
26
11.0
29
674
7.59
26
10.0
29
773
7.75
26
13.0
30
905
7.93
25
13.0
31
593
8.65
36
11.0
34
557
8.67
36
11.0
34
652
8.67
36
11.0
34
747
8.84
36
16.0
35
786
8.86
36
15.0
36
901
9.04
36
14.0
36
1056
9.25
36
14.0
37
7.2
3.9
7.2
3.9
7.8
3.9
8.7
4.2
7.8
4.2
9.3
4.8
9.9
5.4
9.3
5.7
9.3
5.7
9.3
6.0
11.0 6.0
11.0 5.7
12.0 6.6
13.0 6.9
11.0 6.3
11.0 6.3
12.0 6.6
13.0 6.6
13.0 6.3
14.0 7.5
15.0 7.8
12.2
6.9
12.2
6.9
12.6
7.2
13.4
7.2
13.1
6.9
14.9
8.4
15.8
8.7
13.0
7.4
13.0
7.4
13.0
7.5
14.0
8.1
14.0
7.8
16.0
9.2
17.0
9.6
13.5
7.8
13.5
7.8
13.8
7.8
15.0
9.0
14.3
8.7
16.7
9.9
17.4
11.0
14.0 8.4
14.0 8.4
14.0 8.4
16.0 12.0
15.0 12.0
18.0 11.0
18.0 11.0
4.00
15.0
15.0
16.0
17.0
17.0
18.0
20.0
677
9.88
50
9.0 11.0
38
636
9.71
50
9.0 11.0
38
745
9.91
50
9.3 12.0
38
854
10.11
50
13.0 17.0
39
899
10.12
50
14.0 17.0
39
1030
10.34
50
12.0 15.0
40
1207
10.57
49
12.0 15.0
41
17.0
17.0
18.0
18.0
19.0
20.0
22.0
See notes on page F-9
Rev. 0:2005/1
F-13
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(mmxmm)
150x150
225x225
300x300
375x375
450x450
525x525
600x600
NECK
AREA
(m2)
0.019
0.045
0.083
0.132
0.192
0.263
0.346
See notes on page F-9
F-14
(RCD - 4S)
SI - UNITS
NECK
VELOCITY
(m/s)
1.00
1.50
2.00
2.25
2.50
2.75
3.00
3.50
4.00
Q (L/s)
19
29
38
43
48
52
57
67
76
Pt (Pa)
8
12
18
20
21
22
24
35
45
NC
<15
<15
<15
<15
<15
15
15
21
25
Q (L/s)
45
68
91
102
113
125
136
159
181
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
<15
18
22
26
30
36
41
Q (L/s)
83
124
166
187
207
228
249
290
332
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
16
21
26
30
33
39
45
Q (L/s)
132
198
264
296
329
362
395
461
527
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
15
19
24
28
32
36
42
47
Q (L/s)
192
288
384
432
480
528
576
671
767
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
16
18
21
26
31
35
38
44
50
Q (L/s)
263
395
526
592
658
724
790
921
1053
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
18
21
23
28
33
37
40
46
52
Q (L/s)
346
519
691
778
864
951
1037
1210
1383
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
19
22
24
29
34
38
42
48
53
Contd...
Rev. 0:2005/1
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(mmxmm)
225x150
300x150
375x150
450x150
525x150
600x150
300x225
375x225
450x225
375x225
525x225
600x225
375x300
450x300
NECK
AREA
(m2)
0.029
0.040
0.050
0.060
0.071
0.081
0.061
0.077
0.093
0.077
0.109
0.125
0.105
0.126
See notes on page F-9
Rev. 0:2005/1
(RCD - 4R)
SI - UNITS
NECK
VELOCITY
(m/s)
1.00
1.50
2.00
2.25
2.50
2.75
3.00
3.50
4.00
Q (L/s)
29
44
59
66
73
81
88
103
118
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
<15
17
19
24
28
33
38
Q (L/s)
40
60
79
89
99
109
119
139
159
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
<15
18
21
25
29
34
40
Q (L/s)
50
75
100
113
125
138
150
175
200
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
<15
19
23
27
31
36
42
Q (L/s)
60
91
121
136
151
166
181
212
242
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
16
20
24
28
32
37
43
Q (L/s)
71
106
142
159
177
195
212
248
283
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
16
21
25
29
33
38
44
Q (L/s)
81
122
162
183
203
223
243
284
325
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
17
21
25
29
32
39
45
Q (L/s)
61
92
123
138
153
169
184
215
245
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
16
20
24
28
32
37
43
Q (L/s)
77
116
155
174
193
213
232
271
309
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
17
22
26
30
33
38
45
Q (L/s)
93
140
187
210
233
257
280
327
373
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
17
22
27
31
34
40
46
Q (L/s)
77
116
155
174
193
213
232
271
309
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
<15
17
22
26
30
33
38
45
Q (L/s)
109
164
219
246
273
300
328
382
437
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
15
18
23
27
31
35
41
46
Q (L/s)
125
188
250
282
313
344
376
438
501
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
16
19
24
28
32
36
42
47
Q (L/s)
105
157
209
235
261
287
314
366
418
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
15
18
23
27
31
34
40
46
Q (L/s)
126
189
252
284
315
347
378
442
505
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
15
19
24
28
32
36
42
47
Contd...
F-15
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(mmxmm)
525x300
600x300
450x375
525x375
600x375
525x450
600x450
600x525
NECK
AREA
(m2)
0.148
0.169
0.159
0.186
0.213
0.225
0.258
0.302
(RCD - 4R)
SI - UNITS
NECK
VELOCITY
(m/s)
1.00
1.50
2.00
2.25
2.50
2.75
3.00
3.50
4.00
Q (L/s)
148
222
295
332
369
406
443
517
591
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
<15
16
20
25
29
33
37
42
48
Q (L/s)
169
254
339
381
423
466
508
593
677
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
15
18
21
26
30
34
37
43
49
Q (L/s)
159
238
318
358
397
437
477
556
636
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
15
17
20
25
29
33
37
43
49
Q (L/s)
186
279
372
419
466
512
559
652
745
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
16
18
21
26
31
35
38
44
50
Q (L/s)
213
320
427
480
534
587
640
747
854
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
17
18
22
27
32
36
39
45
51
Q (L/s)
225
337
449
506
562
618
674
786
899
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
17
19
22
27
32
36
39
45
51
Q (L/s)
258
386
515
579
644
708
773
901
1030
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
18
20
23
28
33
37
40
46
52
Q (L/s)
302
452
603
679
754
830
905
1056
1207
Pt (Pa)
10
14
20
22
23
30
37
55
75
NC
18
21
24
29
34
38
41
47
53
See notes on page F-9
F-16
Rev. 0:2005/1
CEILING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
PERFORMANCE DATA - IP UNITS
SYMBOLS
CFM :Air volume in cubic feet per minute.
Af
:Effective free area in square feet.
Vf
:Face velocity in feet per minute.
Ak
:Neck area in square feet.
Vk
:Neck velocity in feet per minute.
Pt
:Total pressure in inches water gauge.
Th.
:Throw in feet
NC
:Noise Criteria.
CONDITIONS
• Supply or Return as indicated.
• Noise Criteria values are based on (10 dB) room
attenuation.
• Damper is fully open.
• Maximum room height = 4.0m
• Cooling @ T = 10K
NOTES
• The large throw values are based on the minimum
terminal velocity of 50 fpm.
• The middle throw values are based on the medium
terminal velocity of 100 fpm.
• The small throw values are based on the maximum
terminal velocity of 150 fpm.
CORRECTION FOR 1, 2 AND 3 WAY
• Noise criteria : No correction required.
• Pressure
: No correction required.
• Throw
: 3 way - increase for 15%
: 2 way - increase for 25%
: 1 way - increase for 45%
• Drop
: No correction required.
Notes:
Rev. 0:2005/1
F-17
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
6x6
9x9
12x12
15x15
18x18
21x21
24x24
NECK FREE
NECK
AREA AREA
VELOCITY (fpm)
(SQ.FT.) (SQ.FT.)
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.205
0.096
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.495
0.221
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.893
0.390
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.418
0.595
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.065
0.832
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.833
1.095
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
3.722
1.376
Throw (ft)
NC
See notes on page F-17
Rev. 0:2005/1
(SCD - 4S)
200
40
426
0.014
3
4
<15
98
441
0.008
4
7
<15
176
458
0.010
6
9
<15
279
476
0.010
8
12
<15
407
496
0.010
9
14
<15
558
517
0.010
11 15
<15
733
541
0.010
12 19
<15
8
4
12
7
18
9
23
12
27
14
31
16
35
18
IP - UNITS
300
400
450
500
550
600
700
800
61
638
0.030
6
<15
146
662
0.014
11
<15
264
687
0.015
13
<15
419
714
0.015
17
<15
610
744
0.015
20
<15
837
776
0.015
24
16
1099
811
0.015
27
19
81
851
0.054
9
<15
195
882
0.036
12
<15
352
916
0.032
18
<15
559
952
0.032
23
18
813
992
0.032
27
22
1116
1034
0.036
31
25
1466
1081
0.036
36
29
91
957
0.069
10
<15
219
993
0.043
13
16
396
1031
0.045
19
17
629
1071
0.045
25
23
915
1116
0.045
29
28
1255
1164
0.050
34
31
1649
1216
0.050
39
35
101
1064
0.083
11
<15
244
1103
0.055
13
17
440
1145
0.058
21
19
698
1190
0.058
27
28
1017
1240
0.058
31
34
1395
1293
0.063
36
37
1832
1351
0.063
42
40
111
1170
0.118
11
17
268
1213
0.072
15
20
484
1260
0.074
22
22
768
1310
0.074
28
32
1118
1364
0.074
33
37
1534
1422
0.082
38
40
2016
1486
0.082
44
43
121
1277
0.152
12
19
293
1324
0.080
18
22
528
1374
0.090
24
25
838
1429
0.090
30
35
1220
1488
0.090
34
39
1674
1552
0.100
40
42
2199
1622
0.100
46
45
141
1489
0.164
13
22
341
1544
0.123
20
28
615
1603
0.129
26
32
978
1667
0.129
31
41
1423
1736
0.129
37
44
1953
1810
0.143
43
47
2565
1892
0.143
50
50
161
1702
0.209
14
24
390
1765
0.168
21
33
703
1832
0.174
27
36
1117
1905
0.174
33
45
1627
1983
0.174
53
48
2232
2069
0.196
46
51
2932
2162
0.196
53
53
11
6
18
8
24
12
30
16
34
19
40
22
46
25
14
6
19
9
27
13
33
17
39
20
46
24
53
27
15
7
19
10
28
15
35
19
42
22
49
26
56
30
16
8
20
12
30
16
37
21
44
24
52
29
59
33
16
9
23
14
31
18
40
23
47
27
55
31
63
36
16
10
26
16
32
21
42
26
50
31
58
35
66
40
18
11
28
17
35
23
45
28
53
40
62
38
71
44
18
31
37
49
58
68
78
Contd...
F-18
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
9x6
12x6
15x6
18x6
21x6
24x6
12x9
NECK FREE
NECK
AREA AREA
VELOCITY (fpm)
(SQ.FT.) (SQ.FT.)
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.316
0.146
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.428
0.194
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.539
0.240
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.651
0.285
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.762
0.328
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.874
0.369
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.660
0.294
Throw (ft)
NC
See notes on page F-17
Rev. 0:2005/1
4
5
5
6
6
6
6
(SCD - 4R)
IP - UNITS
200
300
400
450
500
550
600
700
800
62
433
0.008
6
<15
84
441
0.008
7
<15
106
449
0.010
8
<15
128
457
0.010
9
<15
150
465
0.010
9
<15
172
473
0.010
9
<15
130
449
0.010
9
<15
93
650
0.014
8
<15
126
661
0.014
10
<15
159
673
0.014
11
<15
192
685
0.014
12
<15
225
697
0.014
13
<15
258
709
0.014
14
<15
195
674
0.014
12
<15
125
866
0.029
11
<15
169
882
0.031
12
<15
212
897
0.037
15
<15
256
913
0.037
16
<15
300
929
0.037
16
<15
344
946
0.037
19
<15
260
899
0.037
16
<15
140
975
0.049
12
<15
190
992
0.043
13
15
239
1010
0.052
16
15
288
1028
0.052
17
15
338
1046
0.052
17
15
387
1064
0.052
20
16
293
1011
0.052
17
15
156
1083
0.069
13
<15
211
1102
0.055
14
16
265
1122
0.066
17
16
320
1142
0.066
18
16
375
1162
0.066
18
16
430
1182
0.066
22
17
325
1123
0.066
18
16
171
1191
0.094
14
17
232
1212
0.087
15
19
292
1234
0.085
18
19
352
1256
0.085
19
20
413
1278
0.085
19
20
473
1300
0.085
23
21
358
1236
0.085
19
20
187
1299
0.118
15
20
253
1323
0.119
16
21
319
1346
0.104
19
22
384
1370
0.104
20
23
450
1394
0.104
20
23
516
1419
0.104
25
24
390
1348
0.104
20
23
218
1516
0.152
17
26
295
1543
0.152
18
27
372
1571
0.145
21
28
448
1598
0.145
23
29
525
1627
0.145
23
29
602
1655
0.145
27
30
455
1573
0.134
23
29
249
1733
0.207
18
30
337
1764
0.207
20
31
425
1795
0.199
24
32
513
1827
0.199
26
33
600
1859
0.199
26
33
688
1891
0.199
28
34
520
1797
0.170
26
33
11
6
14
7
14
7
15
8
16
10
18
10
15
8
14
8
16
9
19
11
20
12
23
12
25
13
20
12
17
9
19
10
23
12
25
13
27
13
28
14
25
13
18
10
20
11
24
13
26
14
28
14
29
16
26
14
20
11
22
12
25
14
27
15
29
15
31
17
27
15
21
12
23
13
26
15
28
16
30
17
32
19
28
16
22
14
24
15
27
17
30
18
31
19
33
22
30
18
24
15
26
17
29
20
32
21
33
21
36
24
32
21
25
28
32
36
36
38
36
Contd...
F-19
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
15x9
18x9
21x9
24x9
15x12
18x12
21x12
NECK FREE
NECK
AREA AREA
VELOCITY (fpm)
(SQ.FT.) (SQ.FT.)
Q (CFM)
Vf (fpm)
Pt (in-wg)
0.832
0.363
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.004
0.431
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.176
0.495
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.348
0.558
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.125
0.482
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.358
0.570
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.590
0.656
Throw (ft)
NC
See notes on page F-17
Rev. 0:2005/1
6
8
8
8
8
8
8
(SCD - 4R)
IP - UNITS
200
300
400
450
500
550
600
700
800
164
458
0.010
9
<15
198
466
0.010
11
<15
232
475
0.010
10
<15
266
483
0.010
10
<15
222
467
0.010
11
<15
267
476
0.010
10
<15
313
485
0.010
12
<15
246
687
0.014
13
<15
297
699
0.014
14
<15
347
712
0.014
16
<15
398
725
0.014
17
<15
332
700
0.014
15
<15
401
714
0.014
16
<15
470
727
0.014
18
<15
328
915
0.037
17
17
396
932
0.037
20
<15
463
949
0.037
20
<15
531
967
0.037
20
<15
443
934
0.037
21
<15
535
952
0.037
19
<15
626
970
0.037
25
<15
369
1030
0.052
18
21
445
1049
0.052
21
16
521
1068
0.052
21
16
597
1088
0.052
21
17
499
1050
0.052
22
17
602
1071
0.052
20
17
705
1091
0.052
26
17
410
1144
0.066
19
24
494
1165
0.066
23
18
579
1187
0.066
22
18
664
1208
0.066
23
19
554
1167
0.066
23
19
669
1190
0.066
22
20
783
1212
0.066
28
20
451
1259
0.085
20
27
544
1282
0.085
24
22
637
1305
0.085
23
22
730
1329
0.085
24
23
609
1284
0.085
24
23
735
1308
0.085
23
24
861
1334
0.085
29
24
492
1373
0.104
21
30
593
1398
0.104
25
25
695
1424
0.104
25
25
797
1450
0.104
25
26
665
1401
0.104
26
26
802
1427
0.104
24
27
940
1455
0.104
31
27
574
1602
0.134
23
34
692
1631
0.145
27
31
811
1661
0.145
28
31
929
1692
0.145
29
32
776
1634
0.145
28
32
936
1665
0.145
28
33
1096
1697
0.145
32
33
656
1831
0.170
26
38
791
1865
0.199
29
35
927
1899
0.199
30
35
1062
1933
0.199
30
36
887
1867
0.199
31
36
1070
1903
0.199
29
37
1253
1940
0.199
35
37
15
9
20
10
20
10
20
11
22
10
20
11
25
12
23
12
25
14
25
14
25
15
25
15
24
14
31
17
26
18
30
15
29
15
29
16
30
16
28
15
34
19
27
24
31
17
30
17
30
18
31
18
29
17
37
21
29
20
31
18
31
18
31
19
32
19
30
18
40
23
30
17
33
20
31
20
32
21
33
21
31
20
42
25
31
19
34
22
32
23
33
23
34
23
32
23
43
27
34
22
36
24
36
24
36
25
36
25
35
24
47
30
37
39
42
42
41
40
51
Contd...
F-20
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
SUPPLY AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
24x12
18x15
21x15
24x15
21x18
24x18
24x21
NECK FREE
NECK
AREA AREA
VELOCITY (fpm)
(SQ.FT.) (SQ.FT.)
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.823
0.737
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
1.712
0.709
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.005
0.809
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.298
0.909
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.419
0.955
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
2.772
1.072
Throw (ft)
NC
Q (CFM)
Vf (fpm)
Pt (in-wg)
3.247
1.228
Throw (ft)
NC
(SCD - 4R)
200
359
494
0.010
8
11
<15
337
485
0.010
8
11
<15
395
495
0.010
9
13
<15
453
505
0.010
9
15
<15
476
506
0.010
8
14
<15
546
517
0.010
11 16
<15
639
529
0.010
11 17
<15
24
13
24
13
26
13
29
14
26
14
31
16
32
18
IP - UNITS
300
400
450
500
550
600
700
800
539
741
0.014
20
<15
505
720
0.014
20
<15
592
743
0.014
21
<15
679
758
0.014
21
<15
715
759
0.014
20
<15
819
775
0.014
24
<15
959
793
0.015
26
<15
718
988
0.037
26
<15
675
971
0.037
26
<15
790
991
0.037
27
<15
905
1011
0.037
29
<15
953
1012
0.037
28
<15
1092
1034
0.037
31
<15
1279
1057
0.036
33
15
808
1112
0.052
27
18
758
1093
0.052
27
18
888
1115
0.052
28
18
1018
1137
0.052
31
18
1072
1139
0.052
29
18
1228
1163
0.052
34
19
1439
1189
0.050
36
20
898
1235
0.066
29
21
843
1215
0.066
29
21
987
1239
0.066
30
21
1131
1263
0.066
32
22
1191
1266
0.066
31
22
1365
1292
0.066
36
23
1599
1321
0.063
38
24
987
1359
0.085
30
25
928
1334
0.085
30
25
1086
1362
0.085
31
25
1244
1390
0.085
34
26
1310
1392
0.085
32
26
1501
1421
0.085
39
27
1759
1453
0.082
40
28
1077
1483
0.104
31
28
1010
1456
0.104
31
28
1184
1486
0.104
32
28
1358
1516
0.104
36
29
1429
1519
0.104
34
29
1638
1550
0.104
41
30
1918
1586
0.100
41
31
1257
1730
0.145
34
34
1180
1699
0.145
34
34
1382
1734
0.145
35
34
1584
1769
0.145
51
35
1667
1772
0.145
50
36
1911
1809
0.145
45
36
2238
1850
0.143
44
37
1436
1977
0.199
37
38
1348
1943
0.199
37
38
1579
1982
0.199
38
38
1810
2021
0.199
54
39
1905
2025
0.199
55
39
2184
2067
0.199
48
40
2558
2114
0.196
48
41
31
19
31
19
31
20
35
20
34
19
40
22
41
23
37
21
37
21
39
22
41
22
41
21
46
25
48
26
40
23
40
23
41
24
44
24
43
23
49
28
52
29
42
24
42
24
43
25
46
27
44
26
51
30
55
31
44
26
44
26
45
26
49
30
47
29
55
32
57
34
46
28
46
28
47
28
52
39
49
39
58
36
59
37
50
30
50
30
52
31
56
42
56
44
60
40
65
40
55
55
58
60
62
67
71
See notes on page F-17
Rev. 0:2005/1
F-21
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
6x6
9x9
12x12
15x15
18x18
21x21
24x24
NECK
AREA
(SQ.FT.)
0.205
0.488
0.893
1.418
2.065
2.833
3.722
See notes on page F-17
F-22
(RCD - 4S)
IP - UNITS
NECK
VELOCITY
(fpm)
200
300
400
450
500
550
600
700
800
Q (CFM)
40
61
81
91
101
111
121
141
161
Pt (in-wg)
0.032
0.048
0.072
0.078
0.084
0.090
0.095
0.141
0.181
NC
<15
<15
<15
<15
<15
15
15
21
25
Q (CFM)
96
144
192
216
240
265
289
337
385
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
<15
18
22
26
30
36
41
Q (CFM)
176
264
352
396
440
484
528
615
703
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
16
21
26
30
33
39
45
Q (CFM)
279
419
559
629
698
768
838
978
1117
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
15
19
24
28
32
36
42
47
Q (CFM)
407
610
813
915
1017
1118
1220
1423
1627
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
16
18
21
26
31
35
38
44
50
Q (CFM)
558
837
1116
1255
1395
1534
1674
1953
2232
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
18
21
23
28
33
37
40
46
52
Q (CFM)
733
1099
1466
1648
1832
2015
2199
2565
2932
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
19
22
24
29
34
38
42
48
53
Contd...
Rev. 0:2005/1
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
9x6
12x6
15x6
18x6
21x6
24x6
12x9
15x9
18x9
21x9
24x9
15x12
18x12
21x12
NECK
AREA
(SQ.FT.)
0.316
0.428
0.539
0.651
0.762
0.874
0.660
0.832
1.004
1.176
1.348
1.129
1.358
1.590
See notes on page F-17
Rev. 0:2005/1
(RCD - 4R)
IP - UNITS
NECK
VELOCITY
(fpm)
200
300
400
450
500
550
600
700
800
Q (CFM)
62
93
125
140
156
171
187
218
249
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
<15
17
19
24
28
33
38
Q (CFM)
84
126
169
190
211
232
253
295
337
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
<15
18
21
25
29
34
40
Q (CFM)
106
159
212
239
265
292
319
372
425
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
<15
19
23
27
31
36
42
Q (CFM)
128
192
256
288
320
352
384
448
513
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
16
20
24
28
32
37
43
Q (CFM)
150
225
300
338
375
413
450
525
600
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
16
21
25
29
33
38
44
Q (CFM)
172
258
344
387
430
473
516
602
688
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
17
21
25
29
32
39
45
Q (CFM)
130
195
260
293
325
358
390
455
520
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
16
20
24
28
32
37
43
Q (CFM)
164
246
328
369
410
451
492
574
656
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
17
22
26
30
33
38
45
Q (CFM)
198
297
396
445
494
544
593
692
791
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
<15
17
22
27
31
34
40
46
Q (CFM)
232
347
463
521
579
637
695
811
927
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
15
18
23
27
31
35
41
46
Q (CFM)
266
398
531
597
664
730
797
929
1062
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
16
19
24
28
32
36
42
47
Q (CFM)
222
332
442
498
553
608
665
775
885
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
15
18
23
27
31
34
40
46
Q (CFM)
267
401
535
602
669
735
802
936
1070
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
15
19
24
28
32
36
42
47
Q (CFM)
313
470
626
705
783
861
940
1096
1253
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
<15
16
20
25
29
33
37
42
48
Contd...
F-23
CEILLING DIFFUSERS
A I R
D I S T R I B U T I O N
S P E C I A L I S T
RETURN AIR CEILING DIFFUSER, 4 WAY SIZE
(in x in)
24x12
18x15
21x15
24x15
21x18
24x18
24x21
NECK
AREA
(SQ.FT.)
1.823
1.712
2.005
2.298
2.419
2.772
3.247
(RCD - 4R)
IP - UNITS
NECK
VELOCITY
(fpm)
200
300
400
450
500
550
600
700
800
Q (CFM)
359
539
718
808
898
987
1077
1257
1436
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
15
18
21
26
30
34
37
43
49
Q (CFM)
337
506
674
758
843
927
1011
1180
1348
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
15
17
20
25
29
33
37
43
49
Q (CFM)
395
592
790
887
987
1085
1184
1382
1579
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
16
18
21
26
31
35
38
44
50
Q (CFM)
453
679
905
1018
1131
1243
1358
1584
1810
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
17
18
22
27
32
36
39
45
51
Q (CFM)
476
715
953
1072
1191
1309
1429
1667
1905
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
17
19
22
27
32
36
39
45
51
Q (CFM)
546
819
1092
1227
1365
1501
1638
1911
2184
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
18
20
23
28
33
37
40
46
52
Q (CFM)
639
959
1279
1438
1599
1759
1918
2238
2558
Pt (in-wg)
0.040
0.056
0.080
0.086
0.092
0.120
0.149
0.221
0.301
NC
18
21
24
29
34
38
41
47
53
See notes on page F-17
F-24
Rev. 0:2005/1